Zend Server Community Edition on Ubuntu

What is Zend Server CE (Community Edition)

You can think of Zend Server as a bundle of software and Php modules.
For Linux, ZSCE has it’s own php-*-zend-server packages which replace the ones offered by the host Os, usually php5-*
ZSCE automatically installs lighttpd-zend-server used for the web-based administration.

ZSCE comes with a package named php-5.2-xdebug-zend-server. At this moment, the Xdebug version offered by ZSCE is older (2.0.4) than the official one (2.1.0)
# install xdebug.so in /usr/local/zend/lib/php_extensions/
apt-get install php-5.2-xdebug-zend-server
# Add the following line to /usr/local/zend/etc/php.ini
zend_extension=/usr/local/zend/lib/php_extensions/xdebug.so
# You may also add the xdebug directives described in Option 1.